/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#ifndef _HDFS_LIBHDFS_3_UTIL_WritableUtils_H_
#define _HDFS_LIBHDFS_3_UTIL_WritableUtils_H_

#include <string>

namespace Yarn {
namespace Internal {

class WritableUtils {
public:
    WritableUtils(char * b, size_t l);

    bool ReadInt32(int32_t * value);

    bool ReadInt64(int64_t * value);

    bool ReadRaw(char * buf, size_t size);

    bool ReadString(std::string & str);

    bool ReadText(std::string & str);

    bool readByte(char * byte);

    size_t WriteInt32(int32_t value);

    size_t WriteInt64(int64_t value);

    bool WriteRaw(const char * buf, size_t size);

private:
    int decodeWritableUtilsSize(int value);

    int readByte();

    void writeByte(int val);

    bool isNegativeWritableUtils(int value);

    int32_t ReadBigEndian32();

private:
    char * buffer;
    size_t len;
    size_t current;
};

}
}
#endif /* _HDFS_LIBHDFS_3_UTIL_WritableUtils_H_ */
